Alluvial deposits on one or more terrace levels
Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams
Alluvial deposits of present streams
Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.
Light gray, tan and brown fine to coarse sand; some clay silt and gravel.
Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.